From what I can remember regarding the plot:
* 1.) Hero/Adventurer has lost his memory (or can't seem to remember something).
* 2.) He's living with a mother-like figure (Aunt/Mother/Caretaker/etc).
* 3.) Turns out she's a (ex) demon lord and locked away his memory.
* 4.) Ends with her telling him to forget about it and continue living with him.
Pretty sure the whole thing was black and white, normal length of ~24 pages or so, and looked to be in the normal manga art style. Can't say for certain when it was released, but art wasn't ancient.
* 1.) Hero/Adventurer has lost his memory (or can't seem to remember something).
* 2.) He's living with a mother-like figure (Aunt/Mother/Caretaker/etc).
* 3.) Turns out she's a (ex) demon lord and locked away his memory.
* 4.) Ends with her telling him to forget about it and continue living with him.
Pretty sure the whole thing was black and white, normal length of ~24 pages or so, and looked to be in the normal manga art style. Can't say for certain when it was released, but art wasn't ancient.